This is in R programming language

#8)Use a chart to compare average yearly salaries of "Computer and mathematical occupations" (coded 15 - xxxx) in Indiana, California and New York. Use colors and legends to make your chart informative

I have made a df so far that has state, jobcode, and averageYearlySalary. How would I go about making a bar chart to show the average yearly salary for the specific start to a job code by a specific state?